WATERS CORPORATION 2424, Operator'S Manual, Page: 108 / 196

3-44 Operating the Detector
3. If the new mobile phase is miscible with water, replace the 100%
HPLC-quality water with new mobile phase, and equilibrate the system
for 10 minutes at 3 mL/min.
Shutting down the detector
Before you power-off the detector, you must remove any buffered mobile phase
present in the fluid path.
To shut down the detector
1. Remove all buffers from the column and detector.
2. Flow nonbuffered mobile phase through the system.
3. Turn off the pump.
4. Allow the nebulization gas to flow through the detector for a few
minutes to drain the evaporation tube and detection chamber.
5. Stop the gas flow.
6. Power-off the power to the detector.
Tips:
• The last set of selected parameters is retained in memory and becomes
the default condition when the detector is powered-on again.
• It is not harmful to leave the detector powered-on overnight when the
instrument is not in use. To increase the life of the lamp, extinguish it.
• Do not allow solvent flow to continue if no gas flow is present. However,
you may let the nebulizer gas flow at full or reduced rate even in the
absence of solvent flow (that is, when the mobile phase pump is turned
off or the flow rate is set to zero).
Caution:
To avoid damaging the column, remove all buffers from it
before you shut down the detector.